A nest of two sieves consisting of an upper sieve with openings in the range of 2.36 mm (#8) and 1.18 mm (#16), with a 75‑µm (#200) lower sieve, is used when washing.

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When washing aggregate for sieve analysis, you use a sieve nest that lets water and fines pass through while keeping the coarser material on top. The standard setup has two upper sieves with openings around 2.36 mm (No. 8) and 1.18 mm (No. 16), followed by a finer lower sieve at 75 µm (No. 200). This arrangement efficiently separates sizes during washing: the larger fractions stay on the upper sieves, while the fines are captured on the 75 µm sieve for measurement. Using this specific nest ensures that washing removes dust and clay without losing the appropriate size fractions, leading to an accurate gradation for asphalt mix design. So the statement describing this nest for washing aligns with standard practice.